---
title: vfs_ioattr
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.4+]
path: kernel/1523411-vfs_ioattr
---

# vfs_ioattr

Get I/O attributes associated with a mounpoint.

## Declaration

```occ
void vfs_ioattr(mount_t mp, struct vfsioattr *ioattrp);
```

## Parameters

- `mp`: Mount for which to get attributes. If NULL, system defaults are filled into ioattrp.
- `ioattrp`: Destination for results.

## Return Value

Return Value void.